BOPAI Men's Large Capacity Business Backpack, 3-Way4-Way Waterproof, with USB Charging Port, Laptop Bag for Extra Capacity, Perfect for Commuting,

[Service Guarantee] This product comes with a 6-month manufacturer's warranty from the date of purchase. If there is any defect in the product, please feel free to contact us. [Reliable Processing Quality] This collection uses innovative, high-quality materials to create a timeless design that transcends trends and is durable. (Please note: The current version does not support storable shoulder straps. Due to system limitations, we are unable to change the product video, so an older version with storable shoulder straps is displayed. The older version is no longer available.) [Two USB Ports] This backpack with Type-C and USB ports allows you to charge mobile electronic devices such as smartphones and tablets using the built-in charging ports. This is extremely convenient, as it eliminates the need for a charging cable and allows charging without an external power source. You can change the charging port depending on the mobile device. [Anti-theft Design] A hidden anti-theft pocket on the back allows you to safely store valuables such as a wallet and smartphone. [Lightweight and Convenient] The ultra-lightweight material allows for a slim design. The weight isn't a concern, even on long trips. [Adjustable storage capacity design] Dimensions (cm): Approx. 30*14*44 (L*W*H). Weight: 1.09kg. The gusset can be expanded depending on the amount of luggage, so you don't have to worry about carrying more on your business trip. Simply open the zipper and adjust the length of the adjustment straps on both sides to expand the bag's capacity from 20L to 28L.